API 3124MB+

The M+ adds a complete 4x2 stereo mixer to the 3124. Also provided is a post fader Aux send and a stereo Aux return. With the re-design of the 3124 and the 3124M, API brought the phantom power switch to the front, added a polarity switch, added a transformer balanced stereo output option, added a little color, then Jeff wanted to call them the 3124 Plus and the 3124M Plus. ..So, be it...The circuit is still the original 312 mic pre-amp card, with all of the stuff hooked up for you. ..Many have tried to copy it, but it still wins the shoot outs!!!

Features

Uses API 2520 Op-Amp

Classic Console Circuit

Four XLR Mic Inputs

Four 1/4" Un-Balanced Inputs

Front Panel Polarity Switch

Front Panel 20 dB PadSwitch

Front Panel Mic/Line Switch

Front Panel 48V Power Switch

Output Clips at +30 dBm

Both the 3124+ and the 3124M+ are designed with the professional engineer in mind, giving the highest possible quality 4 channel mic preamp and with the 3124M+, an audio mixer, while keeping the size and price at a reasonable level. Several 3124M+ mixers can be linked to increase the number of bussed channels. Both models are equally at home in the control room, the studio, and news or recording truck, at the house console, on the stage, direct-to-DAT, or at the artist's disposal for the source of his music.

The model 3124+ utilizes the same microphone preamp circuit that is used in all API consoles. It uses the RE-115 K mic input transformer and the same output transformer that is used in all API equalizers. All four mic inputs of the 3124+ and the 3124M+ are powered by an internal 48 volt phantom power supply, front panel switchable for each channel. Also provided is a front panel 20 dB pad switch that effects both the Mic and Line in.

The model 3124+ can provide up to 65 dB of gain to an output clip level of +30 dBm. The Hi-Z front panel input goes directly to the op-amp, allowing a low level input such as a guitar or bass to be amplified without a matching transformer or direct box. This Hi-Z input can take input levels as high as +22, making it perfect for keyboards and other high level devices. The rear output is an XLR connector.

The model 3124M+ is a 3124+ with the addition of a complete stereo mixer. In conjunction with the gain control of the 3124+, the 3124M+ adds a stereo panner with a level control, and a post "fader" aux send. The stereo panners and the aux sends are bussed to master output controls and then to the rear panel jacks. A stereo AUX return is provided to return effects or cascade additional mixers for more inputs. The unique aux return pot acts like a panner to balance the left/right signal, yet staying stereo. It can also be used as a mono return. A standard 3124+ can be further expanded to an "m" at the factory. Several options for the "M" include a discrete unbalanced stereo output or a discrete balanced stereo output.